Compare

gistfile1.txt

function compare(a, b, key, order) {
  if (a[key] === b[key]) {
    return 0;
  }

  if (a[key] === null || a[key] === undefined) {
    return order === 'asc' ? -1 : 1;
  }

  if (b[key] === null || b[key] === undefined) {
    return order === 'asc' ? 1 : -1;
  }

  if (typeof a[key] === 'number' && typeof b[key] === 'number') {
    return order === 'asc' ? a[key] - b[key] : b[key] - a[key];
  }

  if (a[key] instanceof Date && b[key] instanceof Date) {
    return order === 'asc' ? a[key] - b[key] : b[key] - a[key];
  }

  // For other types, like string, use localeCompare
  return order === 'asc' ? a[key].localeCompare(b[key]) : b[key].localeCompare(a[key]);
}